Could you post a photo of her comb? It is possible that the comb point is frostbitten (if it is cold where you are). Or, it may have lacked circulation temporarily, or be injured a little--I've often found that if parts of a comb get injured and scab up, when the the scab falls off, the newly healed area is lighter colored for a little while.

I also would say it's frostbite since that is the main reason that chickens comb would turn white. I have a buff Orpington as well and she has a white spot just on the end of her comb due to frostbite.

I also would say it's frostbite since that is the main reason that chickens comb would turn white. I have a buff Orpington as well and she has a white spot just on the end of her comb due to frostbite.

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x2. That sounds like early stages of frostbite. You should put some vassaline on the infected area. That will help heal it.